20 POINTS!!!!!!!

The first five terms in a pattern are shown below.

-0.5, -0.25, 0, 0.25, 0.5, . . .

If the pattern continues, which expression can be used to find the nth term?
A) 0.75n - 1.25
B) -0.25n - 0.25
C) 0.25n - 0.75
D) -0.5n + 0.25